phills1, Hi again.
The piling system I have mentioned is capable of halting completely Subsidence in a two story brick built property?
I used the example of a Conservatory as a guide into what can be achieved by this type of system, that is a bored auger with a steel rod, the rod can then be attached to a Reinforced ground beam at a "Sensible" depth so as to mitigate earth removal and large costs of Concrete.
I would suggest that you at least have a look at the Web sites for this product? they can also provide the requite Calculations as required by Building Control Etc.
My thrust is that if the insurers have successfully used this system to shall I call it "Economically" stop Subsidence permanently in a two story property with trees a lot closer than your problem and in London Clay, notorious for clay shrinkage Subsidence is at least to me, worth a look? might save you a couple of Quid???
What have you got to loose? as for the Structural Engineer, remember he will be reimbursed on the total final cost of your project? and how switched on is he?
Where am I coming from? I work as a Subsidence Claims Specialist for Insurance Companies. As previously stated, if the insurers, all of them use Shire rather than conventional bored piling methods what does that tell you in pounds and pence???
Ken
